Not many shows completely revamp their format midway through their lives, but doing that worked out well for 'Torchwood.'

A couple of years ago, the sci-fi-flavored show, which follows a secretive team that battles threats to Earth, abandoned the monster-of-the-week structure that it had used in its first two seasons. In 2008's 'Torchwood: Children of Earth,' creator Russell T Davies abandoned that format to tell a morally complicated story that spanned five tightly linked episodes.

'Children of Earth' was a critical and commercial success in both the U.S. and U.K., and Davies said in a recent interview in Los Angeles that using a highly serialized format had been a creative breakthrough for 'Torchwood,' which had begun life as a 'Doctor Who' spinoff. Read More...